We encourage you to read the Report on the Investigation into Russian Interference in the 2016 Presidential Election. This report will give you the hows, whys, who, whats and whens regarding the information warfare committed against the United States of America by Russia before, during, and after the 2016 election.
There are a number of ways you can obtain a copy. Below is a list of trustworthy sources:
Listen to the Audio Version on Audible (note: you can obtain the audible app for free and the report is available for free)